This would prevent use of iambic/sideswiper keys. There is no speed adjustment, which is hardcoded at the moment. That isn’t very user friendly, and suggests adding a speed potentiometer to that last remaining pin on the ATtiny. The design accommodates a straight key, but there is one spare pin left over in the ATtiny to allow for iambic or sideswiper keys too. An ATtiny85, a piezo buzzer, some decoupling capacitors, and a few resistors and zeners to allow a safe USB interface. That turned out to be a very resource hungry, impractical project and made him do it right the next time around.
#MIDI MORSE DECODER CODE#
The project is a follow up to his earlier one where he hooked up the Morse key via a RS-232 - USB converter directly to a computer and let the code do all the work. Either way, it’s a great way to hone your skills and prepare for your radio operators license exam. Or you can practise receiving, by asking a friend to punch it out for you. You can practise transmitting, by reading text and typing it out on the key, and then look it up on your computer to see if you made any mistakes. This project isn’t new or fresh, but we stumbled across it while trying to figure out a use for a Morse key lying in the author’s bin of parts. It’s a Saturday afternoon project, with a few parts slapped onto a piece of perf-board, that allows using a Morse key as a USB keyboard. His Morse Code USB Keyboard Mk II adds to that list.
We’ve featured quite a few of ’s projects here in the past, and many of them have the propensity to be labelled “smallest”.
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